/**
 * QUnit - A JavaScript Unit Testing Framework
 *
 * http://docs.jquery.com/QUnit
 *
 * Copyright (c) 2011 John Resig, Jörn Zaefferer
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * or GPL (GPL-LICENSE.txt) licenses.
 */

(function (window) {

    var defined = {
        setTimeout: typeof window.setTimeout !== "undefined",
        sessionStorage: (function () {
            try {
                return !!sessionStorage.getItem;
            } catch (e) {
                return false;
            }
        })()
    };

    var testId = 0;

    var Test = function (name, testName, expected, testEnvironmentArg, async, callback) {
        this.name = name;
        this.testName = testName;
        this.expected = expected;
        this.testEnvironmentArg = testEnvironmentArg;
        this.async = async;
        this.callback = callback;
        this.assertions = [];
    };
    Test.prototype = {
        init: function () {
            var tests = id("qunit-tests");
            if (tests) {
                var b = document.createElement("strong");
                b.innerHTML = "Running " + this.name;
                var li = document.createElement("li");
                li.appendChild(b);
                li.className = "running";
                li.id = this.id = "test-output" + testId++;
                tests.appendChild(li);
            }
        },
        setup: function () {
            if (this.module != config.previousModule) {
                if (config.previousModule) {
                    QUnit.moduleDone({
                        name: config.previousModule,
                        failed: config.moduleStats.bad,
                        passed: config.moduleStats.all - config.moduleStats.bad,
                        total: config.moduleStats.all
                    });
                }
                config.previousModule = this.module;
                config.moduleStats = {all: 0, bad: 0};
                QUnit.moduleStart({
                    name: this.module
                });
            }

            config.current = this;
            this.testEnvironment = extend({
                setup: function () {
                },
                teardown: function () {
                }
            }, this.moduleTestEnvironment);
            if (this.testEnvironmentArg) {
                extend(this.testEnvironment, this.testEnvironmentArg);
            }

            QUnit.testStart({
                name: this.testName
            });

            // allow utility functions to access the current test environment
            // TODO why??
            QUnit.current_testEnvironment = this.testEnvironment;

            try {
                if (!config.pollution) {
                    saveGlobal();
                }

                this.testEnvironment.setup.call(this.testEnvironment);
            } catch (e) {
                QUnit.ok(false, "Setup failed on " + this.testName + ": " + e.message);
            }
        },
        run: function () {
            if (this.async) {
                QUnit.stop();
            }

            if (config.notrycatch) {
                this.callback.call(this.testEnvironment);
                return;
            }
            //try {
            this.callback.call(this.testEnvironment);
            /*} catch(e) {
                fail("Test " + this.testName + " died, exception and test follows", e, this.callback);
                QUnit.ok( false, "Died on test #" + (this.assertions.length + 1) + ": " + e.message + " - " + QUnit.jsDump.parse(e) );
                // else next test will carry the responsibility
                saveGlobal();
    
                // Restart the tests if they're blocking
                if ( config.blocking ) {
                    start();
                }
            }*/
        },
        teardown: function () {
            try {
                this.testEnvironment.teardown.call(this.testEnvironment);
                checkPollution();
            } catch (e) {
                QUnit.ok(false, "Teardown failed on " + this.testName + ": " + e.message);
            }
        },
        finish: function () {
            if (this.expected && this.expected != this.assertions.length) {
                QUnit.ok(false, "Expected " + this.expected + " assertions, but " + this.assertions.length + " were run");
            }

            var good = 0, bad = 0,
                tests = id("qunit-tests");

            config.stats.all += this.assertions.length;
            config.moduleStats.all += this.assertions.length;

            if (tests) {
                var ol = document.createElement("ol");

                for (var i = 0; i < this.assertions.length; i++) {
                    var assertion = this.assertions[i];

                    var li = document.createElement("li");
                    li.className = assertion.result ? "pass" : "fail";
                    li.innerHTML = assertion.message || (assertion.result ? "okay" : "failed");
                    ol.appendChild(li);

                    if (assertion.result) {
                        good++;
                    } else {
                        bad++;
                        config.stats.bad++;
                        config.moduleStats.bad++;
                    }
                }

                // store result when possible
                if (QUnit.config.reorder && defined.sessionStorage) {
                    if (bad) {
                        sessionStorage.setItem("qunit-" + this.module + "-" + this.testName, bad);
                    } else {
                        sessionStorage.removeItem("qunit-" + this.module + "-" + this.testName);
                    }
                }

                if (bad == 0) {
                    ol.style.display = "none";
                }

                var b = document.createElement("strong");
                b.innerHTML = this.name + " <b class='counts'>(<b class='failed'>" + bad + "</b>, <b class='passed'>" + good + "</b>, " + this.assertions.length + ")</b>";

                var a = document.createElement("a");
                a.innerHTML = "Rerun";
                a.href = QUnit.url({filter: getText([b]).replace(/\([^)]+\)$/, "").replace(/(^\s*|\s*$)/g, "")});

                addEvent(b, "click", function () {
                    var next = b.nextSibling.nextSibling,
                        display = next.style.display;
                    next.style.display = display === "none" ? "block" : "none";
                });

                addEvent(b, "dblclick", function (e) {
                    var target = e && e.target ? e.target : window.event.srcElement;
                    if (target.nodeName.toLowerCase() == "span" || target.nodeName.toLowerCase() == "b") {
                        target = target.parentNode;
                    }
                    if (window.location && target.nodeName.toLowerCase() === "strong") {
                        window.location = QUnit.url({filter: getText([target]).replace(/\([^)]+\)$/, "").replace(/(^\s*|\s*$)/g, "")});
                    }
                });

                var li = id(this.id);
                li.className = bad ? "fail" : "pass";
                li.removeChild(li.firstChild);
                li.appendChild(b);
                li.appendChild(a);
                li.appendChild(ol);

            } else {
                for (var i = 0; i < this.assertions.length; i++) {
                    if (!this.assertions[i].result) {
                        bad++;
                        config.stats.bad++;
                        config.moduleStats.bad++;
                    }
                }
            }

            try {
                QUnit.reset();
            } catch (e) {
                fail("reset() failed, following Test " + this.testName + ", exception and reset fn follows", e, QUnit.reset);
            }

            QUnit.testDone({
                name: this.testName,
                failed: bad,
                passed: this.assertions.length - bad,
                total: this.assertions.length
            });
        },

        queue: function () {
            var test = this;
            synchronize(function () {
                test.init();
            });

            function run() {
                // each of these can by async
                synchronize(function () {
                    test.setup();
                });
                synchronize(function () {
                    test.run();
                });
                synchronize(function () {
                    test.teardown();
                });
                synchronize(function () {
                    test.finish();
                });
            }

            // defer when previous test run passed, if storage is available
            var bad = QUnit.config.reorder && defined.sessionStorage && +sessionStorage.getItem("qunit-" + this.module + "-" + this.testName);
            if (bad) {
                run();
            } else {
                synchronize(run);
            }
            ;
        }

    };

    var QUnit = {

        // call on start of module test to prepend name to all tests
        module: function (name, testEnvironment) {
            config.currentModule = name;
            config.currentModuleTestEnviroment = testEnvironment;
        },

        asyncTest: function (testName, expected, callback) {
            if (arguments.length === 2) {
                callback = expected;
                expected = 0;
            }

            QUnit.test(testName, expected, callback, true);
        },

        test: function (testName, expected, callback, async) {
            var name = '<span class="test-name">' + testName + '</span>', testEnvironmentArg;

            if (arguments.length === 2) {
                callback = expected;
                expected = null;
            }
            // is 2nd argument a testEnvironment?
            if (expected && typeof expected === 'object') {
                testEnvironmentArg = expected;
                expected = null;
            }

            if (config.currentModule) {
                name = '<span class="module-name">' + config.currentModule + "</span>: " + name;
            }

            if (!validTest(config.currentModule + ": " + testName)) {
                return;
            }

            var test = new Test(name, testName, expected, testEnvironmentArg, async, callback);
            test.module = config.currentModule;
            test.moduleTestEnvironment = config.currentModuleTestEnviroment;
            test.queue();
        },

        /**
         * Specify the number of expected assertions to gurantee that failed test (no assertions are run at all) don't slip through.
         */
        expect: function (asserts) {
            config.current.expected = asserts;
        },

        /**
         * Asserts true.
         * @example ok( "asdfasdf".length > 5, "There must be at least 5 chars" );
         */
        ok: function (a, msg) {
            a = !!a;
            var details = {
                result: a,
                message: msg
            };
            msg = escapeHtml(msg);
            QUnit.log(details);
            config.current.assertions.push({
                result: a,
                message: msg
            });
        },

        /**
         * Checks that the first two arguments are equal, with an optional message.
         * Prints out both actual and expected values.
         *
         * Prefered to ok( actual == expected, message )
         *
         * @example equal( format("Received {0} bytes.", 2), "Received 2 bytes." );
         *
         * @param Object actual
         * @param Object expected
         * @param String message (optional)
         */
        equal: function (actual, expected, message) {
            QUnit.push(expected == actual, actual, expected, message);
        },

        notEqual: function (actual, expected, message) {
            QUnit.push(expected != actual, actual, expected, message);
        },

        deepEqual: function (actual, expected, message) {
            QUnit.push(QUnit.equiv(actual, expected), actual, expected, message);
        },

        notDeepEqual: function (actual, expected, message) {
            QUnit.push(!QUnit.equiv(actual, expected), actual, expected, message);
        },

        strictEqual: function (actual, expected, message) {
            QUnit.push(expected === actual, actual, expected, message);
        },

        notStrictEqual: function (actual, expected, message) {
            QUnit.push(expected !== actual, actual, expected, message);
        },

        raises: function (block, expected, message) {
            var actual, ok = false;

            if (typeof expected === 'string') {
                message = expected;
                expected = null;
            }

            try {
                block();
            } catch (e) {
                actual = e;
            }

            if (actual) {
                // we don't want to validate thrown error
                if (!expected) {
                    ok = true;
                    // expected is a regexp
                } else if (QUnit.objectType(expected) === "regexp") {
                    ok = expected.test(actual);
                    // expected is a constructor
                } else if (actual instanceof expected) {
                    ok = true;
                    // expected is a validation function which returns true is validation passed
                } else if (expected.call({}, actual) === true) {
                    ok = true;
                }
            }

            QUnit.ok(ok, message);
        },

        start: function () {
            config.semaphore--;
            if (config.semaphore > 0) {
                // don't start until equal number of stop-calls
                return;
            }
            if (config.semaphore < 0) {
                // ignore if start is called more often then stop
                config.semaphore = 0;
            }
            // A slight delay, to avoid any current callbacks
            if (defined.setTimeout) {
                window.setTimeout(function () {
                    if (config.timeout) {
                        clearTimeout(config.timeout);
                    }

                    config.blocking = false;
                    process();
                }, 13);
            } else {
                config.blocking = false;
                process();
            }
        },

        stop: function (timeout) {
            config.semaphore++;
            config.blocking = true;

            if (timeout && defined.setTimeout) {
                clearTimeout(config.timeout);
                config.timeout = window.setTimeout(function () {
                    QUnit.ok(false, "Test timed out");
                    QUnit.start();
                }, timeout);
            }
        }
    };

// Backwards compatibility, deprecated
    QUnit.equals = QUnit.equal;
    QUnit.same = QUnit.deepEqual;

// Maintain internal state
    var config = {
        // The queue of tests to run
        queue: [],

        // block until document ready
        blocking: true,

        // by default, run previously failed tests first
        // very useful in combination with "Hide passed tests" checked
        reorder: true,

        noglobals: false,
        notrycatch: false
    };

// Load paramaters
    (function () {
        var location = window.location || {search: "", protocol: "file:"},
            params = location.search.slice(1).split("&"),
            length = params.length,
            urlParams = {},
            current;

        if (params[0]) {
            for (var i = 0; i < length; i++) {
                current = params[i].split("=");
                current[0] = decodeURIComponent(current[0]);
                // allow just a key to turn on a flag, e.g., test.html?noglobals
                current[1] = current[1] ? decodeURIComponent(current[1]) : true;
                urlParams[current[0]] = current[1];
                if (current[0] in config) {
                    config[current[0]] = current[1];
                }
            }
        }

        QUnit.urlParams = urlParams;
        config.filter = urlParams.filter;

        // Figure out if we're running the tests from a server or not
        QUnit.isLocal = !!(location.protocol === 'file:');
    })();

// Expose the API as global variables, unless an 'exports'
// object exists, in that case we assume we're in CommonJS
    if (typeof exports === "undefined" || typeof require === "undefined") {
        extend(window, QUnit);
        window.QUnit = QUnit;
    } else {
        extend(exports, QUnit);
        exports.QUnit = QUnit;
    }

// define these after exposing globals to keep them in these QUnit namespace only
    extend(QUnit, {
        config: config,

        // Initialize the configuration options
        init: function () {
            extend(config, {
                stats: {all: 0, bad: 0},
                moduleStats: {all: 0, bad: 0},
                started: +new Date,
                updateRate: 1000,
                blocking: false,
                autostart: true,
                autorun: false,
                filter: "",
                queue: [],
                semaphore: 0
            });

            var tests = id("qunit-tests"),
                banner = id("qunit-banner"),
                result = id("qunit-testresult");

            if (tests) {
                tests.innerHTML = "";
            }

            if (banner) {
                banner.className = "";
            }

            if (result) {
                result.parentNode.removeChild(result);
            }

            if (tests) {
                result = document.createElement("p");
                result.id = "qunit-testresult";
                result.className = "result";
                tests.parentNode.insertBefore(result, tests);
                result.innerHTML = 'Running...<br/>&nbsp;';
            }
        },

        /**
         * Resets the test setup. Useful for tests that modify the DOM.
         *
         * If jQuery is available, uses jQuery's html(), otherwise just innerHTML.
         */
        reset: function () {
            if (window.jQuery) {
                jQuery("#qunit-fixture").html(config.fixture);
            } else {
                var main = id('qunit-fixture');
                if (main) {
                    main.innerHTML = config.fixture;
                }
            }
        },

        /**
         * Trigger an event on an element.
         *
         * @example triggerEvent( document.body, "click" );
         *
         * @param DOMElement elem
         * @param String type
         */
        triggerEvent: function (elem, type, event) {
            if (document.createEvent) {
                event = document.createEvent("MouseEvents");
                event.initMouseEvent(type, true, true, elem.ownerDocument.defaultView,
                    0, 0, 0, 0, 0, false, false, false, false, 0, null);
                elem.dispatchEvent(event);

            } else if (elem.fireEvent) {
                elem.fireEvent("on" + type);
            }
        },

        // Safe object type checking
        is: function (type, obj) {
            return QUnit.objectType(obj) == type;
        },

        objectType: function (obj) {
            if (typeof obj === "undefined") {
                return "undefined";

                // consider: typeof null === object
            }
            if (obj === null) {
                return "null";
            }

            var type = Object.prototype.toString.call(obj)
                .match(/^\[object\s(.*)\]$/)[1] || '';

            switch (type) {
                case 'Number':
                    if (isNaN(obj)) {
                        return "nan";
                    } else {
                        return "number";
                    }
                case 'String':
                case 'Boolean':
                case 'Array':
                case 'Date':
                case 'RegExp':
                case 'Function':
                    return type.toLowerCase();
            }
            if (typeof obj === "object") {
                return "object";
            }
            return undefined;
        },

        push: function (result, actual, expected, message) {
            var details = {
                result: result,
                message: message,
                actual: actual,
                expected: expected
            };

            message = escapeHtml(message) || (result ? "okay" : "failed");
            message = '<span class="test-message">' + message + "</span>";
            expected = escapeHtml(QUnit.jsDump.parse(expected));
            actual = escapeHtml(QUnit.jsDump.parse(actual));
            var output = message + '<table><tr class="test-expected"><th>Expected: </th><td><pre>' + expected + '</pre></td></tr>';
            if (actual != expected) {
                output += '<tr class="test-actual"><th>Result: </th><td><pre>' + actual + '</pre></td></tr>';
                output += '<tr class="test-diff"><th>Diff: </th><td><pre>' + QUnit.diff(expected, actual) + '</pre></td></tr>';
            }
            if (!result) {
                var source = sourceFromStacktrace();
                if (source) {
                    details.source = source;
                    output += '<tr class="test-source"><th>Source: </th><td><pre>' + escapeHtml(source) + '</pre></td></tr>';
                }
            }
            output += "</table>";

            QUnit.log(details);

            config.current.assertions.push({
                result: !!result,
                message: output
            });
        },

        url: function (params) {
            params = extend(extend({}, QUnit.urlParams), params);
            var querystring = "?",
                key;
            for (key in params) {
                querystring += encodeURIComponent(key) + "=" +
                    encodeURIComponent(params[key]) + "&";
            }
            return window.location.pathname + querystring.slice(0, -1);
        },

        // Logging callbacks; all receive a single argument with the listed properties
        // run test/logs.html for any related changes
        begin: function () {
        },
        // done: { failed, passed, total, runtime }
        done: function () {
        },
        // log: { result, actual, expected, message }
        log: function () {
        },
        // testStart: { name }
        testStart: function () {
        },
        // testDone: { name, failed, passed, total }
        testDone: function () {
        },
        // moduleStart: { name }
        moduleStart: function () {
        },
        // moduleDone: { name, failed, passed, total }
        moduleDone: function () {
        }
    });

    if (typeof document === "undefined" || document.readyState === "complete") {
        config.autorun = true;
    }

    addEvent(window, "load", function () {
        QUnit.begin({});

        // Initialize the config, saving the execution queue
        var oldconfig = extend({}, config);
        QUnit.init();
        extend(config, oldconfig);

        config.blocking = false;

        var userAgent = id("qunit-userAgent");
        if (userAgent) {
            userAgent.innerHTML = navigator.userAgent;
        }
        var banner = id("qunit-header");
        if (banner) {
            banner.innerHTML = '<a href="' + QUnit.url({filter: undefined}) + '"> ' + banner.innerHTML + '</a> ' +
                '<label><input name="noglobals" type="checkbox"' + (config.noglobals ? ' checked="checked"' : '') + '>noglobals</label>' +
                '<label><input name="notrycatch" type="checkbox"' + (config.notrycatch ? ' checked="checked"' : '') + '>notrycatch</label>';
            addEvent(banner, "change", function (event) {
                var params = {};
                params[event.target.name] = event.target.checked ? true : undefined;
                window.location = QUnit.url(params);
            });
        }

        var toolbar = id("qunit-testrunner-toolbar");
        if (toolbar) {
            var filter = document.createElement("input");
            filter.type = "checkbox";
            filter.id = "qunit-filter-pass";
            addEvent(filter, "click", function () {
                var ol = document.getElementById("qunit-tests");
                if (filter.checked) {
                    ol.className = ol.className + " hidepass";
                } else {
                    var tmp = " " + ol.className.replace(/[\n\t\r]/g, " ") + " ";
                    ol.className = tmp.replace(/ hidepass /, " ");
                }
                if (defined.sessionStorage) {
                    if (filter.checked) {
                        sessionStorage.setItem("qunit-filter-passed-tests", "true");
                    } else {
                        sessionStorage.removeItem("qunit-filter-passed-tests");
                    }
                }
            });
            if (defined.sessionStorage && sessionStorage.getItem("qunit-filter-passed-tests")) {
                filter.checked = true;
                var ol = document.getElementById("qunit-tests");
                ol.className = ol.className + " hidepass";
            }
            toolbar.appendChild(filter);

            var label = document.createElement("label");
            label.setAttribute("for", "qunit-filter-pass");
            label.innerHTML = "Hide passed tests";
            toolbar.appendChild(label);
        }

        var main = id('qunit-fixture');
        if (main) {
            config.fixture = main.innerHTML;
        }

        if (config.autostart) {
            QUnit.start();
        }
    });

    function done() {
        config.autorun = true;

        // Log the last module results
        if (config.currentModule) {
            QUnit.moduleDone({
                name: config.currentModule,
                failed: config.moduleStats.bad,
                passed: config.moduleStats.all - config.moduleStats.bad,
                total: config.moduleStats.all
            });
        }

        var banner = id("qunit-banner"),
            tests = id("qunit-tests"),
            runtime = +new Date - config.started,
            passed = config.stats.all - config.stats.bad,
            html = [
                'Tests completed in ',
                runtime,
                ' milliseconds.<br/>',
                '<span class="passed">',
                passed,
                '</span> tests of <span class="total">',
                config.stats.all,
                '</span> passed, <span class="failed">',
                config.stats.bad,
                '</span> failed.'
            ].join('');

        if (banner) {
            banner.className = (config.stats.bad ? "qunit-fail" : "qunit-pass");
        }

        if (tests) {
            id("qunit-testresult").innerHTML = html;
        }

        if (typeof document !== "undefined" && document.title) {
            // show ✖ for good, ✔ for bad suite result in title
            // use escape sequences in case file gets loaded with non-utf-8-charset
            document.title = (config.stats.bad ? "\u2716" : "\u2714") + " " + document.title;
        }

        QUnit.done({
            failed: config.stats.bad,
            passed: passed,
            total: config.stats.all,
            runtime: runtime
        });
    }

    function validTest(name) {
        var filter = config.filter,
            run = false;

        if (!filter) {
            return true;
        }

        var not = filter.charAt(0) === "!";
        if (not) {
            filter = filter.slice(1);
        }

        if (name.indexOf(filter) !== -1) {
            return !not;
        }

        if (not) {
            run = true;
        }

        return run;
    }

// so far supports only Firefox, Chrome and Opera (buggy)
// could be extended in the future to use something like https://github.com/csnover/TraceKit
    function sourceFromStacktrace() {
        try {
            throw new Error();
        } catch (e) {
            if (e.stacktrace) {
                // Opera
                return e.stacktrace.split("\n")[6];
            } else if (e.stack) {
                // Firefox, Chrome
                return e.stack.split("\n")[4];
            }
        }
    }

    function escapeHtml(s) {
        if (!s) {
            return "";
        }
        s = s + "";
        return s.replace(/[\&"<>\\]/g, function (s) {
            switch (s) {
                case "&":
                    return "&amp;";
                case "\\":
                    return "\\\\";
                case '"':
                    return '\"';
                case "<":
                    return "&lt;";
                case ">":
                    return "&gt;";
                default:
                    return s;
            }
        });
    }

    function synchronize(callback) {
        config.queue.push(callback);

        if (config.autorun && !config.blocking) {
            process();
        }
    }

    function process() {
        var start = (new Date()).getTime();

        while (config.queue.length && !config.blocking) {
            if (config.updateRate <= 0 || (((new Date()).getTime() - start) < config.updateRate)) {
                config.queue.shift()();
            } else {
                window.setTimeout(process, 13);
                break;
            }
        }
        if (!config.blocking && !config.queue.length) {
            done();
        }
    }

    function saveGlobal() {
        config.pollution = [];

        if (config.noglobals) {
            for (var key in window) {
                config.pollution.push(key);
            }
        }
    }

    function checkPollution(name) {
        var old = config.pollution;
        saveGlobal();

        var newGlobals = diff(config.pollution, old);
        if (newGlobals.length > 0) {
            ok(false, "Introduced global variable(s): " + newGlobals.join(", "));
        }

        var deletedGlobals = diff(old, config.pollution);
        if (deletedGlobals.length > 0) {
            ok(false, "Deleted global variable(s): " + deletedGlobals.join(", "));
        }
    }

// returns a new Array with the elements that are in a but not in b
    function diff(a, b) {
        var result = a.slice();
        for (var i = 0; i < result.length; i++) {
            for (var j = 0; j < b.length; j++) {
                if (result[i] === b[j]) {
                    result.splice(i, 1);
                    i--;
                    break;
                }
            }
        }
        return result;
    }

    function fail(message, exception, callback) {
        if (typeof console !== "undefined" && console.error && console.warn) {
            console.error(message);
            console.error(exception);
            console.warn(callback.toString());

        } else if (window.opera && opera.postError) {
            opera.postError(message, exception, callback.toString);
        }
    }

    function extend(a, b) {
        for (var prop in b) {
            if (b[prop] === undefined) {
                delete a[prop];
            } else {
                a[prop] = b[prop];
            }
        }

        return a;
    }

    function addEvent(elem, type, fn) {
        if (elem.addEventListener) {
            elem.addEventListener(type, fn, false);
        } else if (elem.attachEvent) {
            elem.attachEvent("on" + type, fn);
        } else {
            fn();
        }
    }

    function id(name) {
        return !!(typeof document !== "undefined" && document && document.getElementById) &&
            document.getElementById(name);
    }

// Test for equality any JavaScript type.
// Discussions and reference: http://philrathe.com/articles/equiv
// Test suites: http://philrathe.com/tests/equiv
// Author: Philippe Rathé <prathe@gmail.com>
    QUnit.equiv = function () {

        var innerEquiv; // the real equiv function
        var callers = []; // stack to decide between skip/abort functions
        var parents = []; // stack to avoiding loops from circular referencing

        // Call the o related callback with the given arguments.
        function bindCallbacks(o, callbacks, args) {
            var prop = QUnit.objectType(o);
            if (prop) {
                if (QUnit.objectType(callbacks[prop]) === "function") {
                    return callbacks[prop].apply(callbacks, args);
                } else {
                    return callbacks[prop]; // or undefined
                }
            }
        }

        var callbacks = function () {

            // for string, boolean, number and null
            function useStrictEquality(b, a) {
                if (b instanceof a.constructor || a instanceof b.constructor) {
                    // to catch short annotaion VS 'new' annotation of a declaration
                    // e.g. var i = 1;
                    //      var j = new Number(1);
                    return a == b;
                } else {
                    return a === b;
                }
            }

            return {
                "string": useStrictEquality,
                "boolean": useStrictEquality,
                "number": useStrictEquality,
                "null": useStrictEquality,
                "undefined": useStrictEquality,

                "nan": function (b) {
                    return isNaN(b);
                },

                "date": function (b, a) {
                    return QUnit.objectType(b) === "date" && a.valueOf() === b.valueOf();
                },

                "regexp": function (b, a) {
                    return QUnit.objectType(b) === "regexp" &&
                        a.source === b.source && // the regex itself
                        a.global === b.global && // and its modifers (gmi) ...
                        a.ignoreCase === b.ignoreCase &&
                        a.multiline === b.multiline;
                },

                // - skip when the property is a method of an instance (OOP)
                // - abort otherwise,
                //   initial === would have catch identical references anyway
                "function": function () {
                    var caller = callers[callers.length - 1];
                    return caller !== Object &&
                        typeof caller !== "undefined";
                },

                "array": function (b, a) {
                    var i, j, loop;
                    var len;

                    // b could be an object literal here
                    if (!(QUnit.objectType(b) === "array")) {
                        return false;
                    }

                    len = a.length;
                    if (len !== b.length) { // safe and faster
                        return false;
                    }

                    //track reference to avoid circular references
                    parents.push(a);
                    for (i = 0; i < len; i++) {
                        loop = false;
                        for (j = 0; j < parents.length; j++) {
                            if (parents[j] === a[i]) {
                                loop = true;//dont rewalk array
                            }
                        }
                        if (!loop && !innerEquiv(a[i], b[i])) {
                            parents.pop();
                            return false;
                        }
                    }
                    parents.pop();
                    return true;
                },

                "object": function (b, a) {
                    var i, j, loop;
                    var eq = true; // unless we can proove it
                    var aProperties = [], bProperties = []; // collection of strings

                    // comparing constructors is more strict than using instanceof
                    if (a.constructor !== b.constructor) {
                        return false;
                    }

                    // stack constructor before traversing properties
                    callers.push(a.constructor);
                    //track reference to avoid circular references
                    parents.push(a);

                    for (i in a) { // be strict: don't ensures hasOwnProperty and go deep
                        loop = false;
                        for (j = 0; j < parents.length; j++) {
                            if (parents[j] === a[i])
                                loop = true; //don't go down the same path twice
                        }
                        aProperties.push(i); // collect a's properties

                        if (!loop && !innerEquiv(a[i], b[i])) {
                            eq = false;
                            break;
                        }
                    }

                    callers.pop(); // unstack, we are done
                    parents.pop();

                    for (i in b) {
                        bProperties.push(i); // collect b's properties
                    }

                    // Ensures identical properties name
                    return eq && innerEquiv(aProperties.sort(), bProperties.sort());
                }
            };
        }();

        innerEquiv = function () { // can take multiple arguments
            var args = Array.prototype.slice.apply(arguments);
            if (args.length < 2) {
                return true; // end transition
            }

            return (function (a, b) {
                if (a === b) {
                    return true; // catch the most you can
                } else if (a === null || b === null || typeof a === "undefined" || typeof b === "undefined" || QUnit.objectType(a) !== QUnit.objectType(b)) {
                    return false; // don't lose time with error prone cases
                } else {
                    return bindCallbacks(a, callbacks, [b, a]);
                }

                // apply transition with (1..n) arguments
            })(args[0], args[1]) && arguments.callee.apply(this, args.splice(1, args.length - 1));
        };

        return innerEquiv;

    }();

    /**
     * jsDump
     * Copyright (c) 2008 Ariel Flesler - aflesler(at)gmail(dot)com | http://flesler.blogspot.com
     * Licensed under BSD (http://www.opensource.org/licenses/bsd-license.php)
     * Date: 5/15/2008
     * @projectDescription Advanced and extensible data dumping for Javascript.
     * @version 1.0.0
     * @author Ariel Flesler
     * @link {http://flesler.blogspot.com/2008/05/jsdump-pretty-dump-of-any-javascript.html}
     */
    QUnit.jsDump = (function () {
        function quote(str) {
            return '"' + str.toString().replace(/"/g, '\\"') + '"';
        };

        function literal(o) {
            return o + '';
        };

        function join(pre, arr, post) {
            var s = jsDump.separator(),
                base = jsDump.indent(),
                inner = jsDump.indent(1);
            if (arr.join)
                arr = arr.join(',' + s + inner);
            if (!arr)
                return pre + post;
            return [pre, inner + arr, base + post].join(s);
        };

        function array(arr) {
            var i = arr.length, ret = Array(i);
            this.up();
            while (i--)
                ret[i] = this.parse(arr[i]);
            this.down();
            return join('[', ret, ']');
        };

        var reName = /^function (\w+)/;

        var jsDump = {
            parse: function (obj, type) { //type is used mostly internally, you can fix a (custom)type in advance
                var parser = this.parsers[type || this.typeOf(obj)];
                type = typeof parser;

                return type == 'function' ? parser.call(this, obj) :
                    type == 'string' ? parser :
                        this.parsers.error;
            },
            typeOf: function (obj) {
                var type;
                if (obj === null) {
                    type = "null";
                } else if (typeof obj === "undefined") {
                    type = "undefined";
                } else if (QUnit.is("RegExp", obj)) {
                    type = "regexp";
                } else if (QUnit.is("Date", obj)) {
                    type = "date";
                } else if (QUnit.is("Function", obj)) {
                    type = "function";
                } else if (typeof obj.setInterval !== undefined && typeof obj.document !== "undefined" && typeof obj.nodeType === "undefined") {
                    type = "window";
                } else if (obj.nodeType === 9) {
                    type = "document";
                } else if (obj.nodeType) {
                    type = "node";
                } else if (typeof obj === "object" && typeof obj.length === "number" && obj.length >= 0) {
                    type = "array";
                } else {
                    type = typeof obj;
                }
                return type;
            },
            separator: function () {
                return this.multiline ? this.HTML ? '<br />' : '\n' : this.HTML ? '&nbsp;' : ' ';
            },
            indent: function (extra) {// extra can be a number, shortcut for increasing-calling-decreasing
                if (!this.multiline)
                    return '';
                var chr = this.indentChar;
                if (this.HTML)
                    chr = chr.replace(/\t/g, '   ').replace(/ /g, '&nbsp;');
                return Array(this._depth_ + (extra || 0)).join(chr);
            },
            up: function (a) {
                this._depth_ += a || 1;
            },
            down: function (a) {
                this._depth_ -= a || 1;
            },
            setParser: function (name, parser) {
                this.parsers[name] = parser;
            },
            // The next 3 are exposed so you can use them
            quote: quote,
            literal: literal,
            join: join,
            //
            _depth_: 1,
            // This is the list of parsers, to modify them, use jsDump.setParser
            parsers: {
                window: '[Window]',
                document: '[Document]',
                error: '[ERROR]', //when no parser is found, shouldn't happen
                unknown: '[Unknown]',
                'null': 'null',
                'undefined': 'undefined',
                'function': function (fn) {
                    var ret = 'function',
                        name = 'name' in fn ? fn.name : (reName.exec(fn) || [])[1];//functions never have name in IE
                    if (name)
                        ret += ' ' + name;
                    ret += '(';

                    ret = [ret, QUnit.jsDump.parse(fn, 'functionArgs'), '){'].join('');
                    return join(ret, QUnit.jsDump.parse(fn, 'functionCode'), '}');
                },
                array: array,
                nodelist: array,
                arguments: array,
                object: function (map) {
                    var ret = [];
                    QUnit.jsDump.up();
                    for (var key in map)
                        ret.push(QUnit.jsDump.parse(key, 'key') + ': ' + QUnit.jsDump.parse(map[key]));
                    QUnit.jsDump.down();
                    return join('{', ret, '}');
                },
                node: function (node) {
                    var open = QUnit.jsDump.HTML ? '&lt;' : '<',
                        close = QUnit.jsDump.HTML ? '&gt;' : '>';

                    var tag = node.nodeName.toLowerCase(),
                        ret = open + tag;

                    for (var a in QUnit.jsDump.DOMAttrs) {
                        var val = node[QUnit.jsDump.DOMAttrs[a]];
                        if (val)
                            ret += ' ' + a + '=' + QUnit.jsDump.parse(val, 'attribute');
                    }
                    return ret + close + open + '/' + tag + close;
                },
                functionArgs: function (fn) {//function calls it internally, it's the arguments part of the function
                    var l = fn.length;
                    if (!l) return '';

                    var args = Array(l);
                    while (l--)
                        args[l] = String.fromCharCode(97 + l);//97 is 'a'
                    return ' ' + args.join(', ') + ' ';
                },
                key: quote, //object calls it internally, the key part of an item in a map
                functionCode: '[code]', //function calls it internally, it's the content of the function
                attribute: quote, //node calls it internally, it's an html attribute value
                string: quote,
                date: quote,
                regexp: literal, //regex
                number: literal,
                'boolean': literal
            },
            DOMAttrs: {//attributes to dump from nodes, name=>realName
                id: 'id',
                name: 'name',
                'class': 'className'
            },
            HTML: false,//if true, entities are escaped ( <, >, \t, space and \n )
            indentChar: '  ',//indentation unit
            multiline: true //if true, items in a collection, are separated by a \n, else just a space.
        };

        return jsDump;
    })();

// from Sizzle.js
    function getText(elems) {
        var ret = "", elem;

        for (var i = 0; elems[i]; i++) {
            elem = elems[i];

            // Get the text from text nodes and CDATA nodes
            if (elem.nodeType === 3 || elem.nodeType === 4) {
                ret += elem.nodeValue;

                // Traverse everything else, except comment nodes
            } else if (elem.nodeType !== 8) {
                ret += getText(elem.childNodes);
            }
        }

        return ret;
    };

    /*
     * Javascript Diff Algorithm
     *  By John Resig (http://ejohn.org/)
     *  Modified by Chu Alan "sprite"
     *
     * Released under the MIT license.
     *
     * More Info:
     *  http://ejohn.org/projects/javascript-diff-algorithm/
     *
     * Usage: QUnit.diff(expected, actual)
     *
     * QUnit.diff("the quick brown fox jumped over", "the quick fox jumps over") == "the  quick <del>brown </del> fox <del>jumped </del><ins>jumps </ins> over"
     */
    QUnit.diff = (function () {
        function diff(o, n) {
            var ns = new Object();
            var os = new Object();

            for (var i = 0; i < n.length; i++) {
                if (ns[n[i]] == null)
                    ns[n[i]] = {
                        rows: new Array(),
                        o: null
                    };
                ns[n[i]].rows.push(i);
            }

            for (var i = 0; i < o.length; i++) {
                if (os[o[i]] == null)
                    os[o[i]] = {
                        rows: new Array(),
                        n: null
                    };
                os[o[i]].rows.push(i);
            }

            for (var i in ns) {
                if (ns[i].rows.length == 1 && typeof (os[i]) != "undefined" && os[i].rows.length == 1) {
                    n[ns[i].rows[0]] = {
                        text: n[ns[i].rows[0]],
                        row: os[i].rows[0]
                    };
                    o[os[i].rows[0]] = {
                        text: o[os[i].rows[0]],
                        row: ns[i].rows[0]
                    };
                }
            }

            for (var i = 0; i < n.length - 1; i++) {
                if (n[i].text != null && n[i + 1].text == null && n[i].row + 1 < o.length && o[n[i].row + 1].text == null &&
                    n[i + 1] == o[n[i].row + 1]) {
                    n[i + 1] = {
                        text: n[i + 1],
                        row: n[i].row + 1
                    };
                    o[n[i].row + 1] = {
                        text: o[n[i].row + 1],
                        row: i + 1
                    };
                }
            }

            for (var i = n.length - 1; i > 0; i--) {
                if (n[i].text != null && n[i - 1].text == null && n[i].row > 0 && o[n[i].row - 1].text == null &&
                    n[i - 1] == o[n[i].row - 1]) {
                    n[i - 1] = {
                        text: n[i - 1],
                        row: n[i].row - 1
                    };
                    o[n[i].row - 1] = {
                        text: o[n[i].row - 1],
                        row: i - 1
                    };
                }
            }

            return {
                o: o,
                n: n
            };
        }

        return function (o, n) {
            o = o.replace(/\s+$/, '');
            n = n.replace(/\s+$/, '');
            var out = diff(o == "" ? [] : o.split(/\s+/), n == "" ? [] : n.split(/\s+/));

            var str = "";

            var oSpace = o.match(/\s+/g);
            if (oSpace == null) {
                oSpace = [" "];
            } else {
                oSpace.push(" ");
            }
            var nSpace = n.match(/\s+/g);
            if (nSpace == null) {
                nSpace = [" "];
            } else {
                nSpace.push(" ");
            }

            if (out.n.length == 0) {
                for (var i = 0; i < out.o.length; i++) {
                    str += '<del>' + out.o[i] + oSpace[i] + "</del>";
                }
            } else {
                if (out.n[0].text == null) {
                    for (n = 0; n < out.o.length && out.o[n].text == null; n++) {
                        str += '<del>' + out.o[n] + oSpace[n] + "</del>";
                    }
                }

                for (var i = 0; i < out.n.length; i++) {
                    if (out.n[i].text == null) {
                        str += '<ins>' + out.n[i] + nSpace[i] + "</ins>";
                    } else {
                        var pre = "";

                        for (n = out.n[i].row + 1; n < out.o.length && out.o[n].text == null; n++) {
                            pre += '<del>' + out.o[n] + oSpace[n] + "</del>";
                        }
                        str += " " + out.n[i].text + nSpace[i] + pre;
                    }
                }
            }

            return str;
        };
    })();

})(this);
